JP6048353B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat including a position adjusting device that adjusts a relative position of a seat cushion to a floor surface.

  As a vehicle seat provided with such a position adjusting device, one described in Patent Document 1 below is known. The seat described in Patent Document 1 can adjust the vertical position (height) and angle of the seat cushion.

Japanese Utility Model Publication No. 61-34944

  However, although the seat described in Patent Document 1 can adjust the vertical position and angle of the seat cushion, it cannot adjust (slide) the position in the front-rear direction.

  The problem to be solved by the present invention is to provide a vehicle seat that can adjust the position in the front-rear direction in addition to the vertical position and angle of the seat cushion.

  In order to solve the above problems, a vehicle seat according to the present invention is a vehicle seat including a seat cushion on which an occupant is seated and a position adjusting device that adjusts a relative position of the seat cushion with respect to a floor surface. The apparatus has one side connected to the front side connecting portion of the seat cushion, the other side is rotatably connected to the front side supporting portion on the floor surface, and a front side adjusting means capable of adjusting the distance between the front side connecting portion and the front side supporting portion, One side is rotatably connected to a rear side connecting portion that is rearward of the front side connecting portion in the seat cushion, and the other side is rotatably connected to a rear side supporting portion that is rearward of the front side supporting portion on the floor surface. A rear adjustment means capable of adjusting the distance between the connection portion and the rear support portion; one side is the front connection portion of the seat cushion; The side is rotatably connected to a third support part other than the front support part on the floor surface, and the distance between the front connection part and the third support part can be adjusted, or one side is the rear connection part in the seat cushion. And a third adjusting means that is rotatably connected to a third support portion other than the rear support portion on the floor surface and capable of adjusting a distance between the rear connection portion and the third support portion. It is characterized by that.

  The third adjusting means has one side rotatably connected to the front connection portion in the seat cushion and the other side rotatably connected to the rear support portion on the floor surface, or one side connected to the rear connection portion in the seat cushion. The other side may be rotatably connected to the front support portion on the floor surface.

  The front side adjusting means and the rear side adjusting means have a first link member, one side of which is rotatably connected to a connection part of the seat cushion, and one side of which is rotatably connected to a support part on the floor surface, and the other side A link mechanism having a second link member rotatably connected to the other side of the first link member, and changing an angle formed by the first link member and the second link member, thereby allowing the seat cushion to It is good to provide the drive mechanism which changes the distance of the connection part to which the 1st link member was connected, and the support part to which the 2nd link member in the floor surface was connected.

  The vehicle seat according to the present invention operates the same amount of both the front side adjusting means and the rear side adjusting means in the same direction (the third adjusting means is operated in accordance with this), thereby setting the vertical position of the seed back. Can be adjusted. Also, by operating one of the front adjustment means and the rear adjustment means in a predetermined direction larger than the other (the third adjustment means may need to be operated in conjunction with this), the angle of the seat cushion Can be adjusted. In addition, if the third adjusting means is operated and at least one of the front adjusting means and the rear adjusting means is operated so that the angle of the seat cushion does not change, the angle of the seat cushion is not changed. The position of the seat cushion in the front-rear direction can be adjusted (slided).

  Further, when the third adjusting means is provided so as to bridge the front side connection portion and the rear side support portion, or the rear side connection portion and the front side support portion, when adjusting the position of the seat cushion in the front-rear direction, Control to operate at least one of the front adjustment means and the rear adjustment means in accordance with the operation of the third adjustment means is facilitated so that the angle does not change. Further, it is not necessary to provide a place for supporting the third adjusting means on the floor surface.

  Further, if the front side adjusting means and the rear side adjusting means have the above-described link mechanism, the relative position of the seed back with respect to the floor surface can be freely adjusted while ensuring sufficient load bearing performance against the load of the seat and the occupant. can do.

1 is a view schematically showing a vehicle seat according to an embodiment of the present invention (a seat cushion and a seat back are shown by chain lines). It is an external view of a position adjusting device. It is the figure which showed typically a mode when adjusting the up-and-down direction position of a seat cushion, maintaining the angle and the front-and-rear direction position of a seat cushion, and (a) when a seat cushion is moved upwards (B) is the figure which showed the mode when moving a seat cushion below. It is the figure which showed the mode when the angle of the seat cushion was adjusted, and (a) is the state when only the front drive source is reversed and the seat surface angle is adjusted so that the front side of the seat cushion is lowered (B) is the figure which showed the mode when only the rear side drive source was reversed and the seat surface angle was adjusted so that the back side of a seat cushion might become low. It is the figure which showed the mode when the angle of a seat cushion was adjusted, and (a) reverses the front side drive source, rotates the back side drive source forward, and the seat cushion is lowered while the front side is lowered. The state when the seating surface angle is changed so that the rear side of the cushion becomes higher. (B) shows the seat cushion while the front drive source is rotated forward and the rear drive source is reversed so that the front side of the seat cushion is increased. It is the figure which showed the mode when a seat surface angle changed so that the back side might become low. It is the figure which showed the mode when the front-rear direction position of the seat cushion was adjusted while maintaining the angle and the front-rear direction position of the seat cushion, and (a) is the state when the seat cushion is slid forward (B) is the figure which showed the mode when a seat cushion was slid to the back side. It is the figure which showed the modification of the position adjustment apparatus with which one side of the 3rd adjustment means was connected to the front side connection part, and the other side was connected to the rear side support part. It is the figure which showed the modification of the position adjustment apparatus with which the other side of the 3rd adjustment means was connected to locations other than a support part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the front-rear direction refers to the direction (left-right direction in FIG. 1) along the traveling / retreating direction of the vehicle or the like on which the vehicle seat 1 is mounted, and the vertical direction refers to the vertical direction of the vehicle seat 1. The width direction means the width direction of the vehicle seat 1 (the front-rear direction and the direction perpendicular to the up-down direction).

  A vehicle seat 1 according to an embodiment of the present invention shown in FIG. 1 includes a seat cushion 2 (seat portion) on which an occupant sits and a position adjusting device 3 that adjusts the relative position of the seat cushion 2 with respect to a floor surface 4. . A seat back or the like that is a backrest is connected to the seat cushion 2. Further, the seat cushion 2 is provided with a front side connection portion 21 and a rear side connection portion 22 to which each adjusting means described later is connected. Both connecting portions in the present embodiment are axes extending in the width direction connected to the skeleton member of the seat cushion 2. The front side connection part 21 is located in front of the rear side connection part 22. On the other hand, the floor surface 4 is also provided with a front support portion 41 and a rear support portion 42 to which each adjusting means described later is connected. Both support parts in the present embodiment are axes extending in the width direction. Both ends of both support portions (shafts) are fixed to shaft fixing portions 43 and 44 provided so as to protrude from the surface of the floor. Therefore, both support parts are located at a position slightly away from the surface of the floor. The front side support part 41 is located in front of the rear side support part 42. The front connection portion 21 and the front support portion 41 have the same position in the front-rear direction, and the rear connection portion 22 and the rear support portion 42 have the same position in the front-rear direction. Part 21 and front support part 41 overlap, and rear connection part 22 and rear support part 42 overlap).

  The position adjustment device 3 shown in FIGS. 1 and 2 includes a front adjustment means 3f, a rear adjustment means 3r, and a third adjustment means 3t. The front side adjusting means 3f is a means that can adjust the distance between the front side connecting part 21 and the front side supporting part 41, one side being connected to the front side connecting part 21 of the seat cushion 2 and the other side being connected to the front side supporting part 41 on the floor surface 4. Specifically, it has the following configuration.

  The front adjustment means 3f includes a front drive mechanism 31f and a front link mechanism 32f. The front drive mechanism 31f includes a front drive source 311f, a front upper shaft portion 312f, and a front lower shaft portion 313f. The front drive source 311f is for driving both shaft portions so that the front upper shaft portion 312f and the front lower shaft portion 313f advance and retreat (invade and retract from the main body portion so as to change the protruding amount) from both ends of the main body portion. It is a driving source. As long as the front upper shaft portion 312f and the front lower shaft portion 313f can be moved back and forth in this way, any drive source may be used. In the present embodiment, a so-called hollow motor is used as the front drive source 311f. In such a hollow motor, a stator is provided on the outermost radial direction of the motor main body, and a cylindrical rotor is provided on the inner side. A female screw is formed on the inner peripheral surface of the rotor, and a male screw formed on the front upper shaft portion 312f and the front lower shaft portion 313f is screwed to the female screw. For both shafts, the amount of protrusion from the motor body increases when the rotor is rotated forward (rotated to one side), and the amount of protrusion from the motor body decreases when the rotor is reversed (rotated to the other side). Displace.

  The front upper shaft portion 312f is a shaft portion located above the front drive source 311f. The end portion (the end portion opposite to the front drive source 311f) is rotatably connected to the front connection portion 21. The front lower shaft portion 313f is a shaft portion located below the front drive source 311f. The end portion (the end portion opposite to the front drive source 311f) is rotatably connected to the front support portion 41. Therefore, when the rotor of the front drive source 311f is rotated forward and the protruding amount of both shaft portions is increased, the distance between the front connection portion 21 and the front support portion 41 is increased. When the rotor of the front drive source 311f is reversed to reduce the protruding amount of both shaft portions, the distance between the front connection portion 21 and the front support portion 41 is reduced. In this way, the front adjustment means 3f can adjust the distance between the front connection portion 21 and the front support portion 41.

  The front link mechanism 32f includes a front upper link member 321f and a front lower link member 322f. One end (upper end) of the front upper link member 321f is rotatably connected to the front connection portion 21 of the seat cushion 2, and the other end (lower end) is the front lower link member 322f. Is connected to the other side end (upper end) in a rotatable manner. The front lower link member 322f has one end (lower end) rotatably connected to the front support 41 on the floor surface 4, and the other end (upper end) is the front upper link member 321f. Is connected to the other side end (lower end) of the first end of the second end of the second end. In the present embodiment, a pair of a front upper link member 321f and a front lower link member 322f are provided on both sides in the width direction of the front adjustment means 3f. Each link member set is connected by a front link connecting member 323f extending in the width direction provided so as to bridge a place where the front upper link member 321f and the front lower link member 322f are connected.

  When the front drive source 311f is driven and the distance between the front connection portion 21 and the front support portion 41 is changed, the angle formed by the front upper link member 321f and the front lower link member 322f changes. Specifically, as the distance between the front connection portion 21 and the front support portion 41 is decreased, the angle formed by the front upper link member 321f and the front lower link member 322f is decreased, and the distance between the front connection portion 21 and the front support portion 41 is increased. As the distance increases, the angle formed by the front upper link member 321f and the front lower link member 322f increases.

  The rear adjustment means 3r has a rear drive mechanism 31r and a rear link mechanism 32r. The rear drive mechanism 31r includes a rear drive source 311r, a rear upper shaft portion 312r, and a rear lower shaft portion 313r. The rear drive source 311r drives both shaft portions so that the rear upper shaft portion 312r and the rear lower shaft portion 313r move forward and backward from both ends of the main body portion (invade and retract from the main body portion so as to change the protruding amount). It is a drive source for making it. As long as the rear upper shaft portion 312r and the rear lower shaft portion 313r can be moved back and forth in this way, any drive source may be used. In the present embodiment, a hollow motor is used as the rear drive source 311r, similarly to the front drive source 311f. For both shafts, the amount of protrusion from the motor body increases when the rotor is rotated forward (rotated to one side), and the amount of protrusion from the motor body decreases when the rotor is reversed (rotated to the other side). Displace.

  The rear upper shaft portion 312r is a shaft portion located above the rear drive source 311r. The end portion (the end portion opposite to the rear drive source 311r) is rotatably connected to the rear connection portion 22. The rear lower shaft portion 313r is a shaft portion located below the rear drive source 311r. The end portion (the end portion opposite to the rear drive source 311r) is rotatably connected to the rear support portion. Accordingly, when the rotor of the rear drive source 311r is rotated forward and the protruding amount of both shaft portions is increased, the distance between the rear connection portion 22 and the rear support portion 42 is increased. When the rotor of the rear drive source 311r is reversed and the protruding amount of both shaft portions is reduced, the distance between the rear connection portion 22 and the rear support portion 42 is reduced. As described above, the rear adjustment means 3r can adjust the distance between the rear connection portion 22 and the rear support portion.

  The rear link mechanism 32r includes a rear upper link member 321r and a rear lower link member 322r. One end (upper end) of the rear upper link member 321r is rotatably connected to the rear connection portion 22 of the seat cushion 2, and the other end (lower end) is rear lower. The other end (upper end) of the link member 322r is rotatably connected. The rear lower link member 322r has one end (lower end) rotatably connected to the rear support 42 on the floor surface 4, and the other end (upper end) is rear upper. The other end (lower end) of the link member 321r is rotatably connected. In the present embodiment, a pair of a rear upper link member 321r and a rear lower link member 322r are provided on each side in the width direction of the rear adjustment means 3r. Each link member set is connected by a rear link connecting member 323r extending in the width direction provided so as to bridge a portion where the rear upper link member 321r and the rear lower link member 322r are connected.

  When the rear drive source 311r is driven and the distance between the rear connection portion 22 and the rear support portion 42 is changed, the angle formed by the rear upper link member 321r and the rear lower link member 322r changes. Specifically, as the distance between the rear connection portion 22 and the rear support portion 42 is reduced, the angle formed by the rear upper link member 321r and the rear lower link member 322r is reduced, and the rear connection portion 22 and the rear support are formed. As the distance of the portion 42 increases, the angle formed by the rear upper link member 321r and the rear lower link member 322r increases.

  The third adjusting means 3t includes a third drive mechanism 31t having a third drive source 311t, a third upper shaft portion 312t, and a third lower shaft portion 313t. The third drive source 311t drives both shaft portions so that the third upper shaft portion 312t and the third lower shaft portion 313t move forward and backward from the both ends of the main body portion (invade and retract from the main body portion so as to change the protruding amount). It is a drive source for making it. As long as the third upper shaft portion 312t and the third lower shaft portion 313t can be moved forward and backward in this manner, any drive source may be used. In the present embodiment, a hollow motor is used as the third drive source 311t, similarly to the front drive source 311f and the rear drive source 311r. For both shafts, the amount of protrusion from the motor body increases when the rotor is rotated forward (rotated to one side), and the amount of protrusion from the motor body decreases when the rotor is reversed (rotated to the other side). Displace.

  The third upper shaft portion 312t is a shaft portion located on the upper side of the third drive source 311t. The end portion (the end portion opposite to the third drive source 311t) is rotatably connected to the rear connection portion 22. The third lower shaft portion 313t is a shaft portion located below the third drive source 311t. The end portion (the end portion opposite to the third drive source 311t) rotates with respect to the front support portion 41 (in this embodiment, the front support portion 41 also corresponds to the third support portion in the present invention). Connected freely. As described above, the third adjusting means 3t (third drive mechanism 31t) is viewed from the side of the position adjusting device 3 and is connected to one (front side or rear side) and the other (rear side or front side). It is provided to bridge the section diagonally. In the present embodiment, when the rotor of the third drive source 311t is rotated forward and the protrusion amount of both shaft portions is increased, the distance between the rear connection portion 22 and the front support portion 41 is increased. When the rotor of the third drive source 311t is reversed and the protruding amount of both shaft portions is increased, the distance between the rear connection portion 22 and the rear support portion 42 is increased. In this way, the third adjusting means 3t can adjust the distance (the diagonal distance) between the rear connection portion 22 and the front support portion 41.

  The vehicle seat 1 having such a configuration can adjust the vertical position (height), angle, and front-rear direction position of the seat cushion 2 with respect to the floor surface 4. Specifically, it is as follows.

  When adjusting the vertical position of the seat cushion 2 while maintaining the angle and the front-back direction position of the seat cushion 2, both the front drive source 311f and the rear drive source 311r are rotated by the same amount in the same direction. When the seat cushion 2 is moved upward, both the front drive source 311f and the rear drive source 311r are rotated forward by the same amount so that the front connection part 21 and the front support part 41, the rear connection part 22 and the rear The distance of the side support part 42 is increased by the same amount. When the seat cushion 2 is moved upward, the distance between the rear connection portion 22 of the seat cushion 2 and the front support portion 41 must be increased, so that the third drive source 311t is rotated forward accordingly (FIG. 3 (a )reference). When the seat cushion 2 is moved downward, both the front drive source 311f and the rear drive source 311r are reversed by the same amount to reverse the front connection portion 21 and the front support portion 41, the rear connection portion 22 and the rear side. The distance of the support part 42 is reduced by the same amount. When the seat cushion 2 is moved downward, the distance between the rear connection portion 22 of the seat cushion 2 and the front support portion 41 must be reduced, so that the third drive source 311t is reversely rotated accordingly (FIG. 3B). reference). In this way, the vertical position of the seat cushion 2 can be adjusted (lift operation).

  When adjusting the angle of the seat cushion 2, the angle of the seat cushion 2 is set by rotating (driving) at least one of the front drive source 311f and the rear drive source 311r to one side more than the other. The (seat surface angle) can be adjusted. Various examples are conceivable as specific control methods as follows.

  If only the front drive source 311f is rotated forward, the seating surface angle changes so that the front side of the seat cushion 2 becomes higher. If only the front drive source 311f is reversed, the seating surface angle changes so that the front side of the seat cushion 2 is lowered (see FIG. 4A). If the rear drive source 311r is rotated forward, the seat angle changes so that the rear side of the seat cushion 2 becomes higher. If the rear drive source 311r is reversed, the seating surface angle changes so that the rear side of the seat cushion 2 is lowered (see FIG. 4B). When the front drive source 311f is reversed and the rear drive source 311r is rotated forward, the seat surface angle changes so that the front side of the seat cushion 2 is lowered and the rear side of the seat cushion 2 is raised (FIG. 5 ( a)). When the front drive source 311f is rotated forward and the rear drive source 311r is rotated reversely, the seat surface angle is changed so that the front side of the seat cushion 2 becomes higher and the rear side of the seat cushion 2 becomes lower (FIG. 5 ( b)). Thus, when one drive source is rotated forward and the other drive source is rotated reversely, if the forward rotation amount and the reverse rotation amount are the same, the front connection portion 21 and the rear support portion 42 in the seat cushion 2 are exactly in the middle. The seat cushion 2 rotates around the point as the rotation center, and the seating surface angle changes.

  Note that when the seating surface angle is adjusted by driving the rear drive source 311r, the position of the rear connection portion 22 is displaced, and accordingly, the third drive source 311t needs to be driven accordingly. That is, when the rear drive source 311r is rotated forward, the position of the rear connection portion 22 is increased, and accordingly, the third drive source 311t needs to be rotated forward. On the other hand, when the rear drive source 311r is reversely rotated, the position of the rear connection portion 22 is lowered. Therefore, it is necessary to reversely rotate the third drive source 311t.

  When adjusting (sliding) the position of the seat cushion 2 in the front-rear direction while maintaining the angle and the front-rear direction position of the seat cushion 2, the front drive source 311f and the rear drive are driven while the third drive source 311t is driven. The source 311r is driven. When the seat cushion 2 is slid forward, the third drive source 311t is reversed to reduce the distance between the rear connection portion 22 and the front support portion 41 (see FIG. 6A). At this time, if the front drive source 311f and the rear drive source 311r are controlled so that the seat angle does not change, the seat cushion 2 can be slid forward while maintaining the seat angle. When the seat cushion 2 is slid rearward, the third drive source 311t is rotated forward to increase the distance between the rear connection portion 22 and the front support portion 41 (see FIG. 6B). At this time, if the front drive source 311f and the rear drive source 311r are controlled so that the seat angle does not change, the seat cushion 2 can be slid rearward while maintaining the seat angle.

  Note that a switch for adjusting the vertical position, angle, and front-rear direction position of the seat cushion 2 may be provided in advance in or near the vehicle seat 1. If each drive source is controlled as described above when each switch is operated, the occupant can easily adjust the vertical position, angle, and front-rear direction position of the seat cushion 2 arbitrarily.

  Thus, according to the vehicle seat 1 according to the present embodiment, not only the vertical position and angle of the seat cushion 2 but also the longitudinal position can be adjusted.

  Further, in the vehicle seat 1 according to the present embodiment, the front side adjusting means 3f and the rear side adjusting means 3r have different distances between the front side connecting part 21 and the front side supporting part 41, and the rear side connecting part 22 and the rear side supporting part 42. When this is done, a link mechanism that changes in accordance with it (changes the angle formed by the first ring member and the second link member) is provided, so that the load resistance performance against the load of the seat and the occupant is excellent.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention.

  In the said embodiment, the 3rd adjustment means 3t is a means which is connected to the rear side connection part 22 and the front side support part 41, and can adjust the distance of the said rear side connection part 22 and the front side support part 41. However, the present invention is not limited to such a configuration. Specifically, it can be changed as follows. One side of the third adjusting means 3t (the upper end of the third upper shaft portion 312t) is connected to either the front connection portion 21 or the rear connection portion 22. The other side of the third adjustment means 3t (the lower end of the third lower shaft portion 313t) is a place other than the front support portion 41 on the floor surface 4 when one side of the third adjustment means 3t is connected to the front connection portion 21. When one side of the third adjusting means 3t is connected to the rear side connecting portion 22, it may be connected to a place other than the rear side supporting portion 42 on the floor surface 4. In this way, by driving the third drive source 311t, the entire seat cushion 2 moves to the front side or the rear side, so the front drive source 311f and the rear drive source 311r are controlled accordingly. Thus, the seat cushion 2 can be slid in the front-rear direction while maintaining the seating surface angle.

  For example, as shown in FIG. 7, a configuration in which one side of the third adjusting means 3t is connected to the front connection portion 21 and the other side is connected to the rear support portion 42 (in this case, the rear support portion 42 is the present invention). Or a third support part). Moreover, as shown in FIG. 8, the other side of the 3rd adjustment means 3t is connected to the places 45 other than a support part (In this case, the places 45 other than the said support part are equivalent to the 3rd support part in this invention. Yes). At this time, the part to which the other side of the third adjusting means 3t is connected may be between the front support part 41 and the rear support part 42 as shown in FIG. The rear side support part 42 may be the rear side.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 21 Front side connection part 22 Rear side connection part 3 Position adjustment apparatus 3f Front side adjustment means 31f Front side drive mechanism 311f Front side drive source 312f Front side upper shaft part 313f Front side lower shaft part 32f Front side link mechanism 321f Front side upper link Member 322f front lower link member 3r rear adjustment means 31r rear drive mechanism 311r rear drive source 312r rear upper shaft portion 313r rear lower shaft portion 32r rear link mechanism 321r rear upper link member 322r rear lower link member 3t Third adjusting means 31t Third drive mechanism 311t Third drive source 312t Third upper shaft portion 313t Third lower shaft portion 4 Floor surface 41 Front support portion 42 Rear support portion

Claims (3)

A vehicle seat comprising a seat cushion on which an occupant sits and a position adjusting device that adjusts a relative position of the seat cushion to a floor surface,
The position adjusting device includes:
One side is connected to the front side connection part of the seat cushion, the other side is rotatably connected to the front side support part on the floor surface, and the front side adjustment means capable of adjusting the distance between the front side connection part and the front side support part,
One side is rotatably connected to a rear side connecting portion that is rearward of the front side connecting portion in the seat cushion, and the other side is rotatably connected to a rear side supporting portion that is rearward of the front side supporting portion on the floor surface. A rear adjustment means capable of adjusting the distance between the connection portion and the rear support portion;
One side is connected to the front connection part in the seat cushion and the other side is rotatably connected to a third support part other than the front support part on the floor surface, and the distance between the front connection part and the third support part can be adjusted. Alternatively, one side is rotatably connected to the rear connection part in the seat cushion, and the other side is rotatably connected to a third support part other than the rear support part on the floor surface, and the rear connection part and the third support part A third adjusting means capable of adjusting the distance;
A vehicle seat characterized by comprising:   The third adjusting means has one side rotatably connected to the front connection portion in the seat cushion and the other side rotatably connected to the rear support portion on the floor surface, or one side connected to the rear connection portion in the seat cushion. 2. The vehicle seat according to claim 1, wherein the other side is rotatably connected to the front support portion on the floor surface. The front side adjusting means and the rear side adjusting means are:
A first link member, one side of which is rotatably connected to a connection portion of the seat cushion, and one side of which is rotatably connected to a support portion on the floor surface, and the other side of which is rotatable to the other side of the first link member. A link mechanism having a second link member to be connected;
By changing the angle formed by the first link member and the second link member, the connection portion to which the first link member in the seat cushion is connected and the second link member on the floor surface are connected. A drive mechanism that changes the distance to the support;
The vehicle seat according to claim 1 or 2, further comprising:

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